AQA A LEVEL BIOLOGY PAPER 3 2021

AQA A LEVEL BIOLOGY PAPER 3 2021 S - The Marketplace to Buy and Sell your Study Material Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. IB/H/Jun21/E14 7402/3 A-level BIOLOGY Paper 3 Time allowed: 2 hours Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Fill within the boxes at the top based on this page. • Answer all questions within Section A. • Answer one question from Section B. • You must answer the questions within the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at the end based on this book. Write the question number against your answer(s). • Show all your working. • Do all rough work within this book. Cross through any work you do not want to be marked. Information • The marks for the questions are shown within brackets. • The maximum mark for this paper is 78. *JUND0ow1nloa*: For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL S - The Marketplace to Buy and Sell your Study Material Downloaded by: nurse001 | Distribution of this document is illegal S - The Marketplace to Buy and Sell your Study Material 2 *02* IB/H/Jun21/7402/3 1 Section A Answer all questions within this section. You are advised to spend no more than 1 hour and 15 minutes on this section. Do not write outside the box In one species based on squirrel, Sciurus carolinensis, fur colour is controlled by one gene, with two codominant alleles. C G represents the allele for grey fur colour, and C B represents the allele for black fur colour. Table 1 shows the three possible phenotypes.